Smokeless steam-generator.



PATENTED MAR. 10, 1903.

0. D. 0Rv1s.

SMOKELBSS STEAM GENERATOR.

APPLICATION FILED SEPT. 12, 1902.

2 SHEETS-SHEET 1.

NO MODEL.

Fig. 1

awvmwo'c THE Nonms PETERS no vuo'ro umm WASHINGTON. n c.

No. 722,321. PATENTED MAR. 10, 1903.

0. D. ORVIS. I SMOKELESS STEAM GENERATOR.

APPLICATION FILED SEPT. 12, 1902.

2 SHEETS-SHEET 2.

NO MODEL.

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OREL D. ORVIS, OF JAMAICA, NEW YORK.

SMOKELESS STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 722,321, dated March10, 1903.

Application filed September 12, 1902. Serial No. 128,172. iNo model.)

To to whom, it mrtz; concern:

Be it known that I, OREL D. ORVIS, a citizen of the United States,residing at Jamaica, borough of Queens, city of New York, in the countyof Queens and State of New York,have invented certain new and usefulImprovements in Smokeless Steam- Generators, of'

which the following is a specification, reference being bad therein tothe accompanying drawings.

My invention relates to improvements in steam-generators, and morespecifically in that class of steam-generators wherein the air or steamwhich is admitted to the firechambers is heated prior to coming incontact with the burning fuel.

The invention purposes to perfect the combustion of fuel and increasethe generation of steam by establishing a thorough distribution of hotair or superheated steam or their mixture in the fire-chamber.

One of the characteristic features of the invention is an arrangement inthe furnace of heating-cylinders in such a manner that air or steam, orboth, when admitted thereinto shall become highly heated before enteringinto combustion.

Another feature of the invention comprises an arrangement of water-tubesproviding passage for a free circulation of water from the rear of theboiler around the heating-cylinders.

In a practical operation of the invention and as shown in theaccompanying drawings, to which reference will be made hereinafter, twoheatingcylinders are preferably employed. These cylinders, together withcirculating tubes, extend longitudinally beneath the boiler in proximitythereto and within the combustion or flame chamber of the furnace.

Referring to the accompanying drawings, Figure 1 represents alongitudinal section of a steam-generator embodying the invention. Thesection is taken on the line was of Fig. 2, which is a front view of thesteam-generator with the front wall removed. Fig. 3 is a back View withthe rear wall removed.

The letter A designates a fire-tube boiler constructed and set in theusual manner.

B B represent the side walls, 0 the front wall, and D the rear wall, ofthe furnace.

F is a bridge-wall forming the back of the fire-chamber G, and H is anopening in the top of the bridge-wall F, over which the flame and'gasesmake their escapefrom beneath the boiler.

I I are heating-cylinders. These cylinders are made of fire-clay orother highly-refractory heat-storing material, are provided with adouble series of port-holes or openings J J and K K, and are closed atthe rear end.

L L are partitions or walls of fire-brick or other suitable materialextending vertically from the tops of the heating-chambers I I to thelower portion of the shell of the boiler A and longitudinally along theentire length of the heating-cylinders. The cylinders and theirpartitions extend from the inside of the front wall 0 of the furnace tothe back of the bridge-wall F and are separated by an intermediateflame-space.

The circulating system starts from the rear of the boiler near thebottom thereof and is fed through the main tube 0, projecting therefrom.This tube feeds the branch tubes 0 O, the lower ends of which are joinedto the rear ends of the tubes M 'M, extending along the inner sides ofthe heating-cylinders I I. The front ends of the tubes M M are joined byconnecting-tubes P P, which are set in the front Wall 0 of the furnace.The outer ends of the connecting-tubes P P are joined to the front endsof the tubes N N, extending along the outer sides of theheating-cylinders, and the rear ends of the tubes N N are joined to thelower ends of the vertical return-tubes R R, which enter the boileratapoint just above the water-line.

U U are blow-off pipes connected to the rear ends of the tubes N N ofthe circulating system and are supported upon and extend beyond the rearfurnace-wall D.

T T are supply-pipes entering the chambers V V of the heating-cylindersI I for conveying air or superheated steam or their mixture to theopenings J J and K K.

S represents the grate-bars.

By referring now to Figs. 1 and 2 it will be observed that the openingsK K of the heating-cylinders I I are obliquely disposed and willdischarge part of the contents of the chambers V V below the innercirculatingtubes M M into the incandescent fuel on the grate-bars S,while the openings J J simultaneously and in like manner discharge intothe flame-space above. With this arrangement any combustible gases whichhave not been ignited at the lower discharge from the openings K K willbe ignited at the upper discharge from the openings J J before escapingover the bridge-Wall F. It will also be seen that the upper section F ofthe bridgewall F is built upwardly and outwardly against the lower sidesof the boiler A and furnace-walls B B and inwardly against theheating-cylinders I I and their partitions L L,

thereby preventing the escape of flame or gases at either side of thefurnace. The chilling effect upon the flame and combustible gases of theburning fuel caused by their contact with the lower shell of the boilerand the consequent imperfect combustion is obviated by thehighly-refractory heat-storing cylinders, which present an additionalsurface of a sufficiently high temperature to effect a perfectcombustion. I have also found air and saturated steam admitted tofurnaces below the burning temperature; but with the arrangement ofheating-cylinders herein described the steam is highly superheated andthe air is brought to a very high temperature before entering theflame-chamber of the furnace.

The invention is not confined to use in con nection with a steamgenerator of the particular construction shownand described,and theimprovements may be variously modified Without a substantial departurefrom the real invention.

Having thus described my invention, what I claim is 1. In a furnace thecombination of a heating-cylinder of fire-clay or otherhighly-refractory, heat-storing material having a double row ofport-holes on one side and a watercirculating tube at each side of saidcylinder, said port-holes disposed to discharge simultaneously above andbelow one of said watercirculating tubes substantially as described.

2. In the furnace of a steam-generator, the combination of aheating-cylinder having a double row of port-holes on one side, awatercirculating tube at each side of said cylinder, said port-holesdisposed to discharge at the same time above and below one of saidwater-circulating tubes and a partition between said heating-cylinderand the boiler substantially as described.

3. In a furnace the combination of two or more heating-cylinders offire-clay or other highly-refractory, heat-storin g material, eachcylinder having a double row of port-holes through the inner side, awater-circulating tube at the inner side and a water-circulating tube atthe outer side of each of said heating-cylinders, the port-holes of onecylinder opposite the port-holes of the other cylinder and saidport-holes of each cylinder disposed to discharge at the same time aboveand below an inner water-circulating tube substantially as described.

4. In the furnace of a steam-generator, the combination of two or moreheating-cylinders, each cylinder having a double row of port-holesthrough the inner side, a watercirculating tube at the inner side and awater-circulating tube at the outer side of each of saidheating-cylinders, the port-holes of one cylinder opposite theport-holes of the other cylinder, said port-holes of each cylinderdisposed to discharge simultaneously above and below an innerwater-circulating tube, a partition between each of saidheating-cylinders and the boiler, a bridge-wall dividing thefire-chamber from the back of the furnace and an upper section to saidbridge-wall extending inwardly from the side walls of the furnace to theboiler and to said partitions and heating cylinders substantially asdescribed.

5. In a steam-generator, a furnace containing two or more multiportedheating-cylinders, a bridge-wall dividing the fire-chamber from the backof the furnace and an upper section to said bridge-wall, partitionsextending between said cylinders and the boiler and two or more pairs ofwater-circulating tubes extending longitudinally beneath the boiler, thefront end of each tube being joined by a connecting-tube set in thefront wall of the furnace substantially as described.

6. In a steam-generator, a furnace containing two or more multiportedheating-cylinders, a bridge-wall and an upper section on said bridgewall, partitions extending between said cylinders and the boiler and asystem of water-circulating and blow-off tubes supported by the frontand rear Walls of the furnace substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

OREL D. ORVIS.

WVitnesses:

FRANK J. GRIFFIN, JAMES F. LILLY.

